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- W2019929461 abstract "It is well-known that cold-formed steel (CFS) members of open section can buckle locally, distortionally and/or lateral-torsionally. Since they are usually used as the secondary structural members in buildings to support roof and side cladding or sheeting, CFS beams are mostly treated as the restrained beams either fully or partially in its lateral and/or rotational directions. For a thin-walled channel- or zed-section beam subjected to uplift loading, if its upper flange is fully restrained in its lateral and rotational directions, the beam will not buckle lateral-torsionally, but may have a web-flange distortional buckling . In the literature there is limited information on the web-flange distortional buckling and currently the critical stress for the web-flange distortional buckling is calculated mainly by using numerical methods. In this paper an analytical model is presented to describe the web-flange distortional buckling behavior of the partially restrained CFS beams when subjected to uplift loading. Formula used to calculate the critical stress of web-flange distortional buckling is derived. Comparisons of the predicted critical stresses with those obtained using finite strip and finite element methods are provided to demonstrate the appropriateness of the model proposed. • It provides an analytical solution of web-flange distortional buckling of CFS purlins. • An analysis model is proposed for describing web-flange distortional buckling of CFS purlins. • Influence of rotational restraint on the lateral-torsional and web-flange distortional buckling is examined. • The solution is validated using the finite strip and finite element analysis methods." @default.
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- W2019929461 date "2014-12-01" @default.
- W2019929461 modified "2023-10-16" @default.
- W2019929461 title "Web-flange distortional buckling of partially restrained cold-formed steel purlins under uplift loading" @default.
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- W2019929461 doi "https://doi.org/10.1016/j.ijmecsci.2014.10.011" @default.
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